Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1750/HaandMeDoonDaFiddle.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3318-HaandMeDoonDaFiddle.ps) >>/Users/jc/w/tmp/Tune-3318-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1750/HaandMeDoonDaFiddle.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-3318-HaandMeDoonDaFiddle.abc 156 ABC music file with the extracted tune(s)
Tune-3318-HaandMeDoonDaFiddle.ps 6 PostScript
Tune-3318-HaandMeDoonDaFiddle.txt 156 Plain-text file with the extracted tune(s)
Tune-3318-get.log 8635 Log file, useful mostly for debugging
Tune-33183-get.log 3236 Log file, useful mostly for debugging
Tune-33184-Thompson_V2_1758-1765_FTM.pdf 2217 Portable Data Format
Tune-33184-get.log 5311 Log file, useful mostly for debugging
Tune-33185-get.log 5327 Log file, useful mostly for debugging
These files should be available for 24 hours.